Good for you! I switched to all organic when I learned that the 2 biggest polluters of our groundwater are lawn care products and dog poop that people don't pick up. Yikes!
I'm in the same quandary as you as to brand, but I would add that I do compost all my kitchen scraps and use that to add to the lawn. I also mulch my leaves big time with the mower and let that organic matter work its way in. A good metal grass rake will help break things up too. I often do my leaves 2-3 times in the fall to break them up into small enough pieces to help and not cause problems like dead spots and leaf mold.
Also, you probably need lime even if they haven't told you so. It's pretty cheap. I used pelletized lime because there is less dust than the powdered stuff - if you do it right before a rainstorm, it washes in. I wouldn't do it before one of these massive 3-day storms we've had lately though - it would wash away. We have so many pines in New England that create an acid soil - so the lime balances that out. It's okay if the lime gets into your gardens too - you don't have to be too accurate with the spreader so it's fast.
Good luck!